Patent US2670848A successfully refreshed from Google Patents.
US2670848A
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Floating self-adjusting liquid skimmer
Assignee: Shell Development Co
•
Filing: 1951-05-03
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Granted: 1954-03-02
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Expires: 1971-05-03
Abstract
No abstract record available.
Inventors
- 👤 Hermanus T Van Houten
- 👤 Ludovicus J P Smulders
- 👤 Johannes H Van Zeeland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:49
CPC Classifications
E; E02; E02B; E02B15/00; E02B15/04; E02B15/10; B; B01; B01D; B01D17/00; B01D17/02; B01D17/0208; B01D17/0214; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86236; Y10T137/86252
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1942241A
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US2051149A
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US2072206A
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US2119348A
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US2330508A
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US2348938A
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US2439633A
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US2509933A
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US2497177A
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US2608300A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |